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UNTTED STATES PATENT Ormea.

ALBERT G. BRUST AND WILLIAM H. DOUGLAS, OF WASHINGTON, D. O.

DOUBLE-ACTING PUMP.

SPECIFICATION forming part of Letters Patent No. 239,436, dated March29, 1881. Application led September 4, 1880. (No model.)

To all whom it may concern Be it known that we, ALBERT G; BRUST andWILLIAM H. DOUGLAS, of Washington, in the county' of Washington andDistrict of Columbia, have invented anew and valuable Improvement inDouble-Acting Pumps; and we do hereby declare that the following is afull, clear, and exact description of the construction and operationofthe saine, reference being 1o had to the annexed drawings, making apart of this specification, and to the letters and tigures of referencemarked thereon.

Figure l ofthe drawings is a representation of a longitudinal sectionot' this invention. Fig.

2 is a cross-section of the same. Fig. 3 is a detail view, in section,of the valved projection.

This invention has relation to pumps for use in connection withwater-supply pipes; and it consists in the construction and novelarrangezo ment, in connection with the piping, `of an intermediatesection having a recessed projec-` tion on Vone side formedwith twoindependent valve-chambers, respectively, for the supply and discharge,the outer and inner valves con- 2 5 nected therewith, the vibratorycylinder having a sector-piston attached to its inside surface andworking on the side ot' the cylindersection opposite to its recessedprojection, the packings, glands, and the.lever handle attached to thevibratory cylinder, all as hereinafter shown and described.

In the accompanying drawings, the letterA designates any ordinarywater-supply pipe from which a portion has been removed, which 3 5 isreplaced bythe recessed and valvedsection B,'with reference to which theportion ct of the main pipe becomes the supply, and b the discharge, theintermediate section, B, being connected thereto by means ot' threadedunions or 4o other'Water-tightcouplings. Theintermediate section, B, iscylindrical in form, having at its "middle portion a projection, O, onone side, .which is made with a supply-chamber, D, and adischarge-chamber, E, which are independenttot' each other, beingseparated by a wall,

c, in\the section. The exterior surfaces of the cylindrical ends of thesection form gland and axis bearings f, as hereinafter described. Theouter surface, d, of the projection C is coil- 5o cave usually, as shownin the drawings, and is covered with a packing, e, and packings c aresecured to the ends of the projection. The side on the discharge sidehaving the valvel internal. For the latter, in small pumps, a ballvalvemay be conveniently used, acting in common for the opposite openings,h.r

F represents the working or vibratory cylinder, the interior surface ofwhich is concentric with the valved section B. This cylinder is providedwith ends or heads, or with one end, m, and one head, n, each having aboxprojection, p, threaded to engage with a cap, q, and forming thesleeve-box of the glandbearing c, upon or with which the cylinder Fturns, when operated by means of an external lever-handle, G, securedthereto. Packings z are applied within the gland.

To the interior wall ot' the cylinder D is secured a sector-piston, H,which is formed with a concave inner surface, s, upon which is secured apacking, t, working upon the cylindrical bearing-surface, not' lthevalved section, which is opposite the valved projection O, as shown inthe drawings.

The cylinder Fturus easily on its axis-bearings at the ends of thevalve-section. Being vibrated by means of its handle, it is apparentthat the inwardly-projecting piston H is alternately brought nearer eachside of the valved projection G than it is to the other, so that itswater-chambers I and K become each alternately greater or less than theother. As these chambers each communicate with both the supply anddischarge chambers of the valved section B on one side thereof, it isapparent that the valves of each section are put in action at eachmovement of the cylinder, so that as the water-chamber I contracts thewater therein closes the supply-valve k of one side, and the watertherein is driven through the opening hofthesame side into thedischarge-chamberll, closing its opposite valve-opening h and flowingout through the discharge-pipe fv. At the same time the water-chamberKof the cylinder F enlarges, drawing the water in through the oppositesupply-opening g, raising its valve k.

This pump is very readily attached to water- IDO pipes in house's andyards and operates with great effect, While but little power is neededto Work it. Being double-acting, the pump produces a continuousdischarge.

For large constructions it is designed to form a longitudinal slot inthe piston H, and introduce packing, and a T-formed gland, which isadjustable upon threaded posts, nuts being applied on these posts andbearing on the back of the gland.

Having described this invention, what we claim, and desire to secure byLetters Patent, 1s-

The double-acting pumping attachment for supply-pipes, consistingof thevalve-section B, having the side projection, C, formed with theindependent supply-chamber D and dischargel chamber E, their respectiveopposite openings

